Why is a dedicated shut-off valve for ammonia needed?
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Why is a dedicated shut-off valve for ammonia needed? Are there ball valves or gate valves specifically for ammonia?
It’s probably due to pressure issues; the shut-off valve for ammonia is considered a medium-pressure valve. I’ve also encountered only ammonia shut-off valves; there are no others
There are also specialized ones; I know that this testing probe is specialized, and the stop valve is also specialized – I wasn’t aware of that
Because liquid ammonia is corrosive and the temperature is extremely low, seals are likely to leak
It’s mainly due to sealing issues, according to the veteran employees.
Stop valves and check valves are used for ammonia to ensure sealing performance and resistance to low temperatures; for ammonia, there are only stop valves, no gate valves
All the ones I’ve seen are ammonia stop valves, and the reason for this is as explained by the expert above.